osx github action initial commit

.github/workflows/package-osx.yaml

@@ -0,0 +1,27 @@
+name: OSX Package
+
+on: [workflow-dispatch]
+
+jobs:
+  build:
+    runs-on: macos-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 14.0.1
+        uses: actions/setup-java@v1
+        with:
+          java-version: 14.0.1
+      - name: Cache Gradle packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+          restore-keys: ${{ runner.os }}-gradle
+      - name: Build with Gradle
+        run: ./gradlew jpackage
+      - name: Upload Artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: Sparrow OSX Build
+          path: build/jpackage/*